ABB TPL65-A32 - Speed Measurement System

Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33
Troubleshooting
6
Speed measurement sy
stem
6.5
Page 71
September 2014 HZTL2498_EN Revision A
Speed measurement system
6.5
Possible causes
Elimination
Signal
amplitude non
existent or
poor
Fitting error
The screw plug for the sensor is fitted with a
gasket.
When fitting the speed sensor, this gasket
must be removed. If it is fitted by mistake,
the distance from the sensor tip to the
signal-
generating sealing disc increases. As
a result, the voltage amplitude of the speed
signal decreases, which can cause problems
for the evaluation electronics.
This problem is eliminated by removing the
gasket.
Defective sensor
Contact ABB Turbocharging service station.
Measured
speeds too
high
Dirty sensor tip The sensor tip is magnetic and can thus
attract metal particles. As a result, the
distance to the auxiliary bearing decreases,
which can lead to amplification of the noise
component and consequently to faulty
triggering.
Remove the sensor, clean its tip and refit the
sensor using the specified tightening torque.
Measured
speed too low
- -
Contact ABB Turbocharging service station.
Other sources
of errors
- - If none of the above measures eliminates
the problem, we recommend that you have
the speed measuring system inspected by
an official ABB Turbocharging service
station.
6.5
© Copyright 2014 ABB. All rights reserved.